<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title>Document</title>
</head>
<body>
<!--<h1>hello common</h1>-->
<?=isset($this->blocks['block1'])?$this->blocks['block1']:"<h1>hello common</h1>";?>
<?=$content;?>
</body>
</html>